Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Carboxyl separator of additive self-assembly layer of lithium-sulfur battery and preparation method of carboxyl separator

A self-assembled layer and lithium-sulfur battery technology, applied in the field of electrochemical power sources, can solve the problems of numerous preparation process steps and unfavorable industrial production, and achieve the effects of improving cycle performance, safe and reliable production process, and thermodynamic stability

Active Publication Date: 2018-06-15
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
View PDF5 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method requires pre-preparation of microporous supports, mesoporous supports and macroporous supports that meet the requirements, including the process of high-temperature pyrolysis of sugar compounds to prepare porous carbon, preparation of slurry and coating. The preparation process has many steps, which is not conducive to the industry. chemical production

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Carboxyl separator of additive self-assembly layer of lithium-sulfur battery and preparation method of carboxyl separator
  • Carboxyl separator of additive self-assembly layer of lithium-sulfur battery and preparation method of carboxyl separator
  • Carboxyl separator of additive self-assembly layer of lithium-sulfur battery and preparation method of carboxyl separator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The preparation method of the carboxylated diaphragm of the additional self-assembled layer of the lithium-sulfur battery comprises the steps:

[0036] Preparation of reagents: molar concentration of lithium hydroxide 0.1mol L -1 The proportion of dissolved in deionized water to make a solution; molar concentration of persulfate 0.1 ~ 1mol L -1 The ratio is dissolved in deionized water to make a solution; hydrogen peroxide is added into deionized water according to the mass ratio of 0.1% to 1% to make a mixed solution; polydiallyl dimethyl ammonium chloride is diluted with deionized water to The mass ratio is 20%; the sodium polystyrene sulfonate is diluted to 30% with deionized water.

[0037] (1) carry out carboxylation treatment to ordinary battery diaphragm;

[0038] The diaphragm is preferably a polypropylene diaphragm or a polypropylene / polyethylene / polypropylene three-layer composite diaphragm, and the exposed surface of the diaphragm must have side chain carbo...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention relates to a carboxyl separator of an additive self-assembly layer of a lithium-sulfur battery. In the separator, a conventional battery separator is used as a substrate material by carboxylation, at least one blocking layer formed from the self-assembly layer is introduced to a surface of the substrate material, the self-assembly layer comprises constituents of sodium polystyrene sulfonate, polarized polyvinylidene fluoride or sodium carboxymethyl cellulose, carboxyl on the self-assembly layer and the separator has dual blocking effects on a polysulfide lithium intermediate bodyformed during the charge-discharge process of a sulfur positive electrode, and the stability of the separator can be further ensured by the self-assembly layer. Active substance sulfur in electrochemical reaction can be limited at one side of the positive electrode by the carboxyl separator of the additive self-assembly layer, the polysulfide lithium intermediate body formed during the circulation process of the sulfur positive electrode is prevented from being dissolved in an electrolyte to generate irreversible capacity attenuation, and the cycle property of the sulfur positive electrode isimproved. The invention also comprises a preparation method of the carboxyl separator of the additive self-assembly layer.

Description

technical field [0001] The invention belongs to the field of electrochemical power sources, and in particular relates to a carboxylated separator for an additional self-assembly layer of a lithium-sulfur battery and a preparation method thereof. Background technique [0002] With the rapid development of microelectronics technology, it has greatly accelerated the pace of upgrading in the mobile communication and computer industries. Electrical components are required to be smaller in size, more complete in function, and longer in standby time. In the structure of lithium batteries, the separator is one of the key inner components. The performance of the separator determines the interface structure and internal resistance of the battery, which directly affects the capacity, cycle and safety performance of the battery. A separator with excellent performance plays an important role in improving the overall performance of the battery. The main function of the diaphragm is to s...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/14H01M2/16H01M10/052H01M50/403H01M50/409H01M50/457H01M50/489
CPCH01M10/052H01M50/403H01M50/411Y02E60/10
Inventor 武俊伟白赟顾文亮
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com